Finger-ring expander.



No. 827,290. Y PATENTED 111L231, 1906..

' A. E. BOYLAN & c. OHAMBERLIN.

FINGER RING EXPANDER.

APPLIUATION FILED APR. 22. 1905.

- did/022m wicn esesg I W lnventorfl,

Aftorneys.

To all whom it may concern:

Be it'known that we, AARON F. BOYLAN and ELZIE C. CHAMBERLIN, citizens of the United States, residing at Denison, in the 5 county of Crawford and State of Iowa, have invented a new and usefulFinger-Ring Expander, of which the following is a specification. This inventionrelates to a finger-ring expander. i

The object of the invention is to provide a simple, cheap, efiicient, and novel implement which may be manipulated to effect expanding of rings, especially set-rings, without any I danger of injury to the stones and in which 'the operation of expanding is not attended with any marring of the ring, so'that expensive refinishing when the expanding operation is completed is entirely obviated. 2o Withthe above and other objects in view, as will appear as the nature of the invention is better understood, the same consists in the novel construction and combination of parts of a finger-ringex ander, as will behereinaf- 2 5 ter fully describe and claimed.

In the accompanying drawings, forming a part of this specification, and in which like characters of reference indicate corresponding parts, Figure 1 is a view in perspective of 0 the implement, showing it operatively combined with a ring -to be expanded- Fig. 2 is a view in transverse section on an enlarged scale. Fig. 3 is a-sideview of the open head.

The implement embodies a pair of levers 1 3 5 and 2, suitably connected for rocking movements relatively to each other by means of a stud' 3, projecting from one end of one of the leversin this instance the lever 2and engaging a recess 4 in one end of the other lever, a in 5passing through the lever 1 and throng one of a series of orifices 6 in the stud 3, serving to hold the parts connected. The lever 2 in this instance will be stationary, and

the lever 1 will be fulcrumed by the pin 5 and moved relatively to the first-named lever. In order to effect the requisite adjustment of the lever 1 to cause the implement to perform its function, the stud 3 is provided with the series of orifices 6 referred to, thereby to 5o render the implement adaptable upon any size ring.

The lever 1 is provided with a head 7, in the end of which the recess 4 is located, and secured to the under side of the head or formed integral therewith is a yoke 8, (more Am with? Q A BEFQ E, fl N Q A? p t Patented July 31,190

I clearly shown in Fig. 2,) between the members of which is mounted the expanding-f v roller 9, the same being held combined with the yoke by means of a removable pin 10,

in connection with any kind 0 ring. The 6 5 end of the lever 2 which carries the stud 3 is 5 provided with an 0 en head 11, provided on 7 its upper face wit transversely-alined recesses or depressions 12, in which is adapted to rest a mandrel 13, upon which the ring R to be expanded is placed. The recesses or seats in the head 1 1 will be ofdiiferent depths I to correspond to the taper of the mandrel, so that when the latter is ositioned in the seats it will have a firm and solid bearing therein, '75 and be held from any rocking movements. The seats, however, permit the mandrel to be rotated therein. By the provision of the open head a set-ring maybe operated upon without the set coming in contact with any part of the implement.

In the use of the implement a roller having the appropriate shape to coact with the ring 1 is first selected and positioned in the yoke.

' The ring is then forced .upon the mandrel as '85] far down as possible. The latter is thenpositioned upon the head 11, and thepin 5 is v brought into the appropriate orifice in the stud 3 to causethe op osed faces of the two r 'heads 7 and 11 tobe inparallelism. Pressureis then applied to the levers, and upon a rotary motion being imparted to the implement the expanding-roller will spread the ring. During the operation of the expanding 5 care must be taken-to see that the ring is 5 kept tightly associated with the mandrel; otherwise the proper expanding cannot be i secured, and, furthermore, the clrcular form of the ring will be destroyed.

The implement of the resent invention, 1,00 3

while exceedingly simple 0 construction, will I p be found thoroughly effective in use forthe purposes designed, maybe cheaply and read ily manufactured, and will secure the results 1 designed as eflectively as can be done by higher-priced machines now on the market for this-purpose. I I Y Having thus described the invention, what is claimed is i A ring-expander"comprising a lever'prorro carrying a depending yoke, and an expanding-r01ler mounted between the yoke members.

@{In testimony that We claim the foregoing as our own we have"hereto aflixedour signatures 1n the presence of two Witnesses.

AARON F. BOYLAN. ELZIE C. CHAMBERLIN.

Witnesses L. SEEMANN, SEARS M. HENRY. 

